CN115217189A - Office building pipe network circulation system and flow balance adjusting method thereof - Google Patents
Office building pipe network circulation system and flow balance adjusting method thereof Download PDFInfo
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- 230000001105 regulatory effect Effects 0.000 claims abstract description 15
- 239000003651 drinking water Substances 0.000 claims description 31
- 235000020188 drinking water Nutrition 0.000 claims description 31
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/02—Arrangements or adaptations of tanks for water supply for domestic or like local water supply
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/072—Arrangement of flowmeters
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/08—Arrangement of draining devices, e.g. manual shut-off valves
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Abstract
The invention discloses an office building pipe network circulating system and a flow balance adjusting method thereof, wherein the method comprises the following steps: make each floor loop in a subarea at the same debugging flow Q 0 Circulating independently; the floor with the greatest head loss, called the worst floor, is selected and designated as L 0 Closing water inlet valves of other floors and independently allowing L 0 The floors are circulated, and the L is recorded 0 The pressure value of the floor-to-home pressure gauge is P 1 Record the L 0 The pressure value of the floor outlet pressure gauge is P 2 And the L is 0 The pressure difference of the pressure gauges for the entrance and the exit of the floor is recorded as P 0 ，P 0 =P 1 ‑P 2 (ii) a For each floor of other floors, the same L is adopted 0 Method for the same floor, closing other floorsThe water inlet valve independently circulates the layer at the same flow Q 0 Then, the outlet regulating valve of the floor is regulated to ensure that the pressure difference value of the inlet and outlet pressure gauges of each floor of loop is equal to P 0 (ii) a And opening water inlet valves of all the floors after all the floors are adjusted, so that the subarea enters a full circulation mode.
Description
Technical Field
The invention relates to the technical field of pipeline direct drinking water, in particular to an office building pipe network circulating system and a flow balance adjusting method thereof.
Background
In the pipeline direct drinking water system of the building, the finished water produced by the central water purifying equipment is conveyed to the drinking water terminals of all floors of the whole building through a food-grade pipe network. The longer the water stays in the pipe network system, the faster the water quality decreases. In order to ensure that the water quality of the whole water supply network is qualified, the stored water in the pipe network must be recovered to a central machine room at regular time for secondary disinfection and sterilization, and the recovery and secondary disinfection process is the pipe network circulation process. The pipe network system must deeply consider the circulation effect, i.e. whether the flow distribution of each pipe flow path is balanced or not, during the design and construction. The circulation effect is not good, some return water is not smooth, the water stored in the pipeline can not be completely recovered for secondary disinfection and sterilization, and the water quality of the user end is unqualified.
In the design of a pipe network circulation system, the following two forms are generally adopted:
first, a riser circulation system. As shown in figure 1, after the whole system is vertically partitioned, a plurality of vertical pipes are arranged in each partition to vertically penetrate all floors in the partition, and drinking water points are arranged close to the vertical pipes. The design of fig. 1 applies to: all drinking water points of the building are basically definite, and the drinking water points of all floors are consistent or close. The disadvantages of the riser cycle design of fig. 1 are: for office buildings with rental properties, if tenants are undetermined and the drinking water point position is unknown, unified planning of building riser penetration cannot be achieved. In addition, in fig. 1, if the number of drinking water points of each floor is large, the number of vertical pipes vertically penetrating all the floors is too large, and the engineering feasibility is difficult to meet.
The second, flat circulation system. As shown in fig. 2, each floor forms a loop for water supply and water return, and the floors are in parallel connection, so that the resistance characteristics of the parallel pipelines are required to be identical or similar, and the current general solution is that the pipeline paths of each floor are identical. The design of fig. 2 applies to: the drinking water points of all floors and the pipeline laying scheme are designed to be relatively consistent in a unified mode, the resistance characteristics of each flat circuit are approximately the same, and the water power is basically balanced. The disadvantages of the flat-bed loop design of fig. 2 are: in order to ensure that the resistance characteristics of pipelines of all floors are consistent, the pipes need to be constructed according to a unified scheme strictly, so that the actual requirements of users on different floors cannot be met, and the engineering application and implementation of a pipeline direct drinking water system in the field of office buildings are greatly restricted.
Due to the complexity of office building scenarios, system architecture planning and engineering solutions encounter a number of difficulties. In most projects, the drinking water scheme of each floor is unknown in the system design stage, so that complete pipe network design cannot be developed. At present, in the actual operation of most office building pipeline direct drinking water projects, an effective and convenient debugging means and a monitoring method for the circulation effect are lacked for a partitioned circulation system, and particularly, a corresponding quantifiable operation method is lacked.
Disclosure of Invention
The present invention is intended to solve the above-mentioned technical problems. Therefore, the invention aims to provide an office building pipe network circulating system and a flow balance adjusting method thereof, which can realize the flow balance of each parallel loop of the circulating system based on a quantifiable means.
The technical scheme adopted by the invention is as follows:
in a first aspect, the present invention provides an office building pipe network circulation system, including: the water supply vertical pipe is connected with a water supply pump of a direct drinking water machine room and used for supplying water for buildings, and an outlet of the water supply pump of the direct drinking water machine room is provided with a flow meter; the subarea water supply vertical pipe is connected with the water supply vertical pipe, vertically penetrates all floors of a subarea and supplies water to the subarea floors; a plurality of flat water supply pipelines which are laid on each floor of the subarea, wherein each flat water supply pipeline is connected with the subarea water supply vertical pipe and laid horizontally along the floor, a plurality of drinking points with unequal number and uncertain positions are led out from each flat water supply pipeline, the number and the positions of the drinking points are determined according to the actual demands of users on each floor, and an entrance pressure meter and an entrance valve are arranged at the inlet of each flat water supply pipeline; the system comprises a plurality of flat-layer water return pipelines, a plurality of water supply pipelines and a plurality of household pressure gauges, wherein the flat-layer water return pipelines are laid on each layer of the subarea, each flat-layer water return pipeline is connected with one flat-layer water supply pipeline and horizontally laid along the floors, the laying scheme of each layer of the flat-layer water return pipeline is different, each flat-layer water return pipeline is used for collecting return water of the flat-layer water supply pipeline, an outlet of each flat-layer water return pipeline is provided with one household pressure gauge and one household regulating valve, and the caliber of a pipe section where the household pressure gauge is located in each floor is consistent with that of a pipe section where the household pressure gauge is located; a subregion return water riser, with this subregion water supply riser parallel arrangement, vertical all floors that run through in this subregion are connected with these many flat bed return water pipe, and this subregion return water riser is used for collecting these many flat bed return water pipe's return water, retrieves this return water to this directly drinking water computer lab again.
In a second aspect, the present invention provides a method for adjusting flow balance of an office building pipe network circulation system, which is applied to the office building pipe network circulation system, and the method includes: make each floor loop in a subarea at the same debugging flow Q 0 Then circulating independently; the floor with the greatest head loss, called the worst floor, is selected and designated as L 0 Closing water inlet valves of other floors and independently letting L 0 The floors are circulated, and the L is recorded 0 The pressure value of the floor-to-home pressure gauge is P 1 Record the L 0 The pressure value of the floor outlet pressure gauge is P 2 The L is 0 The pressure difference of the pressure gauges for the entrance and the exit of the floor is recorded as P 0 ，P 0 = P 1 - P 2 (ii) a For each floor of other floors, the same L is adopted 0 The method for making floors identical is characterized by that the water inlet valves of other floors are closed, and said floor can be independently circulated, and at the same flow rate Q 0 Then, the outlet regulating valve of the floor is regulated to ensure that the pressure difference value of the inlet and outlet pressure gauges of each floor of loop is equal to P 0 (ii) a And after all the floors are completely adjusted, opening the water inlet valves of all the floors to enable the subarea to enter a full circulation mode, and realizing flow balance of each floor loop.
Wherein, the floor loops in one subarea are enabled to be at the same debugging flow Q 0 The following separate cycles were performed, including: measuring the flow rate based on the flowmeter, and adjusting the frequency of a frequency converter of the water supply pump so as to change the rotating speed of the water supply pump, so that the flow rate of each floor is the same when the floor is circulated independently; or byThe return water valve in the direct drinking water machine room is adjusted to ensure that the flow of each floor is the same when the floor is circulated independently.
Wherein the floor with the largest head loss is selected as the worst floor, and is designated as L 0 The method comprises the following steps: the worst floor L 0 The selection criteria of (2) are to select the floor with the longest path of the pipeline and the most fittings, the types of the fittings include: elbow, tee bend, reducing joint, valve and water gauge.
Wherein the floor with the largest head loss is selected as the worst floor, and is designated as L 0 The method comprises the following steps: cannot judge which layer is L 0 When in floor, all floors are enabled to be at the same debugging flow Q 0 Respectively and independently circulating the lower floors, recording the pressure difference of the pressure gauges of the exit and the entrance of all floors, and selecting the floor with the maximum pressure difference as the L 0 And (3) a layer.
The invention has the beneficial effects that:
the invention leads each parallel loop of the pipe network circulation system to be at the same debugging flow Q 0 And then, regulating the household regulating valves of the parallel loops to ensure that the pressure difference of the parallel loops is equal to the pressure difference of the floor with the maximum head loss, and then opening the water inlet valves of the parallel loops to ensure that the parallel loops enter a circulation mode, wherein ideal flow balance can be realized for the floor loops. The invention overcomes the technical problem that the design of a pipe network circulating system in the prior art is difficult to meet the actual scenes of different office buildings, realizes a flexible and convenient pipe network circulating system which is arranged according to the actual requirements by users on each floor, and can adjust the pipe network circulating system by adopting a relatively accurate quantification method so as to keep the flow of each parallel loop of the pipe network circulating system balanced, thereby meeting the requirements of various actual drinking water application scenes of the buildings.
Drawings
FIG. 1 is a schematic diagram of a pipe network circulation system according to one embodiment of the present technique;
FIG. 2 is a schematic diagram of another embodiment of a pipe network circulation system according to one technique;
FIG. 3 is a schematic structural diagram of an embodiment of a pipe network circulation system according to the present invention;
FIG. 4 is a schematic flow chart illustrating an embodiment of a method for adjusting flow balance of a pipe network circulation system according to the present invention;
FIG. 5 is a quantized graph of operating conditions for one embodiment of pressure differential regulation for each parallel circuit in step S02 of FIG. 4;
FIG. 6 is a quantized graph of operating conditions for one embodiment of pressure differential regulation in parallel circuits of step S03 of FIG. 4;
FIG. 7 is a quantized graph of operating conditions for one embodiment of pressure differential regulation for each parallel circuit in step S04 of FIG. 4;
FIG. 8 is a quantified graph of the behavior of the change from FIG. 6 to FIG. 7;
fig. 9 is a schematic structural diagram of an embodiment of a floor circuit in the pipe network circulation system of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a pipe network circulation system according to an embodiment of the present invention. As shown in fig. 3, the pipe network circulation system includes a vertical water supply pipe, a vertical zoning water supply pipe, a plurality of flat water supply pipes, a plurality of flat water return pipes, and a vertical zoning water return pipe.
The vertical water supply pipe is connected with a water supply pump of a direct drinking water machine room, and water is supplied to each partition of the building after the vertical partition of the vertical water supply pipe. Wherein, in one subarea, the subarea water supply vertical pipe vertically penetrates all floors of the subarea to supply water for the floors of the subarea,
optionally, a pressure reducing valve is arranged between the water supply vertical pipe and the subarea water supply vertical pipe according to pressure calculation so as to meet the pressure requirement. It is worth mentioning that the outlet of the water supply pump of the direct drinking water machine room is provided with a flow meter.
The plurality of flat-layer water supply pipelines are laid on each layer of the subarea, each flat-layer water supply pipeline is connected with the subarea water supply vertical pipe and is horizontally laid along the floor, a plurality of drinking points with unequal quantity and uncertain positions are led out on each flat-layer water supply pipeline, and an entrance pressure gauge and an entrance valve are arranged at the inlet of each flat-layer water supply pipeline.
According to the actual field conditions of users on each floor, the laying schemes of all the layers of the flat water supply pipeline can be obviously different, so that the resistance characteristics of the flat water supply pipeline on each floor are allowed to be different.
The number and the positions of the drinking points are flexibly set according to the requirements of users on each floor, so that the difference of pipe network resistance characteristics of each floor caused by the difference of the number and the positions of the drinking points is allowed.
Wherein, every layer of this subregion is laid to these many flat bed return water pipes, and every flat bed return water pipe is connected with a flat bed water supply pipe, and lays along the floor level, and this every flat bed return water pipe is used for collecting the return water of this a flat bed water supply pipe, sets up a meter of pressure and a governing valve of registering one's residence in the export of this every flat bed return water pipe.
According to the actual field conditions of users on each floor, the laying schemes of each floor may have significant differences, so that the resistance characteristics of the flat-layer water return pipeline on each floor are allowed to be different.
The caliber of the pipe section where the home pressure gauge is located is consistent with the caliber of the pipe section where the home pressure gauge is located.
Wherein, this subregion return water riser, with this subregion water supply riser parallel arrangement, vertical all floors that run through in this subregion are connected with these many flat bed return water pipe, and this subregion return water riser is used for collecting the return water of these many flat bed return water pipe, retrieves this return water again to this straight drink water computer lab.
It can understand, this each floor pipe network of subregion presents the parallel relation that flow resistance is unequal, and every pipe flow path length is unanimous in the vertical direction, satisfies perpendicular same journey relation promptly, but on the horizontal direction, because each floor pipe network length is unequal, lays the scheme and also differs, so the resistance characteristic of each parallel circuit differs, and this difference is because of satisfying the inevitable result that different users' actual demand shows in the engineering implementation of office building pipeline straight drinking water.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating an embodiment of a method for adjusting flow balance of a pipe network circulation system according to the present invention. As shown in fig. 4, the adjusting method includes the steps of:
s01: make each floor loop in a subarea at the same debugging flow Q 0 Circulating independently;
in step S01, a flowmeter is provided at the outlet of the water supply pump in the machine room, and the rotational speed of the water supply pump is changed by adjusting the frequency of the frequency converter of the water supply pump, so that the flow rates of the water supply pump during the individual circulation of the floors are the same. Or the flow of each floor in independent circulation can be controlled to be the same by adjusting a water return valve in the machine room.
S02: the floor with the greatest head loss, called the worst floor, is selected and designated as L 0 Closing water inlet valves of other floors and independently allowing L 0 The floors are circulated and the L is recorded 0 The pressure value of the floor-to-home pressure gauge is P 1 Record the L 0 The pressure value of the floor outlet pressure gauge is P 2 The L is 0 The pressure difference of the pressure gauges for the entrance and the exit of the floor is recorded as P 0 ，P 0 = P 1 - P 2 ；
In step S02, the worst floor L 0 The selection criteria of (2) are to select the floor with the longest path of the pipeline and the most fittings, the types of fittings include: elbows, tees, reducer joints, valves, water meters, and the like.
Cannot judge which layer is L 0 When in floor, all floors are enabled to be at the same debugging flow Q 0 Respectively and independently circulating the lower floors, recording the pressure difference of the pressure gauges of the entrance and the exit of all floors, and selecting the floor with the largest pressure difference as the L 0 A layer. Specifically, as shown in fig. 5, taking 4 floors as an example, each parallel loop circulates independently and at the same debugging flow Q 0 Recording the pressure value P of the pressure gauge of each floor under the working condition 1 And the pressure value P of the pressure meter 2 And obtaining pressure difference data of each floor, and respectively recording the data as: p is 0 （L 1 ）、P 0 （L 2 ）、P 0 （L 3 ) And P 0 . The method for calculating the pressure difference of each floor comprises the following steps:
P 0 （L 1 ）=P 1 （L 1 ）-P 2 （L 1 ）；
P 0 （L 2 ）=P 1 （L 2 ）-P 2 （L 2 ）；
P 0 （L 3 ）=P 1 （L 3 ）-P 2 （L 3 ）；
P 0 = P 0 （L 0 ）=P 1 （L 0 ）-P 2 （L 0 ）。
wherein the pressure difference data P of each floor is calculated 0 （L n ) Comparing the floor with the largest pressure difference as L 0 And (3) a layer.
S03: for each floor of other floors, the same L is adopted 0 The method for making floors identical is characterized by that the water inlet valves of other floors are closed, and said floor can be independently circulated, and at the same flow rate Q 0 Then, the outlet regulating valve of the floor is regulated to ensure that the pressure difference value of the inlet and outlet pressure gauges of each floor of loop is equal to P 0 ；
In step S03, the household regulating valves of all floors are regulated to ensure the pressure difference P of all loops 0 （L 1 ）、P 0 （L 2 ）、P 0 （L 3 ) Are all equal to P 0 。
As shown in FIG. 6, each parallel loop (floor) is adjusted individually to track P 0 And recording the working condition of the value. The pressure differential increases after increasing the drag loss of the other circuits relative to the worst-case circuit.
S04: and after all the floors are completely adjusted, opening the water inlet valves of all the floors to enable the subarea to enter a full circulation mode, so that the flow balance of each floor loop is realized.
In step S04, as shown in fig. 7, during the full cycle, the total flow rate of the water supplied to the local partition is redistributed in equal proportion by each parallel circuit (floor), thereby achieving the flow rate balance. As shown in fig. 8, the total flow of the partitions is distributed in equal proportion to each parallel loop, and each loop is reduced compared with the debugging flow, but the balance relation of the flows is not changed.
Through the steps S01 to S04, all floors have the same resistance characteristic. Therefore, under the full circulation mode, the flow of each floor is kept the same, and the flow balance relation is not influenced by the flow change of the water supply main pipe. The balance relation is not influenced by the power characteristics and resistance characteristics (including the lift of a water supply pump, the resistance characteristics of a water supply main pipe, a partition pressure reducing valve and the like) outside the circulation partition, and is not influenced by the flow change of the water supply main pipe.
Specifically, the working principle of the above-mentioned adjusting method is as follows:
referring to fig. 9, fig. 9 is a schematic structural diagram of a floor circuit in a pipe network circulation system according to an embodiment of the present invention. As shown in fig. 9, the energy equation for the column flow between section 1 and section 2 of the pipe section:
wherein Z is a position water head,
in order to be a pressure head of water,
in order to obtain a flow velocity head,
is the total head loss.
Two cross sections are the same flat layer pipeline with the same height, so Z 1 =Z 2 Therefore, the above equation (1) can be transformed into:
and because of the continuous closed flow field, the flow of any section is equal, and according to a constant total flow continuity equation:
since the pipe diameters of the section 1 and the section 2 are equal, A 1 =A 2 Substituting the above formula (3) to obtain V 1 =V 2 . Will V 1 =V 2 Substituting into the above equation (2) yields:
namely: the pressure head loss from section 1 to section 2 is converted into the head loss of the pipe section of the layer.
Changing the above equation (4) to an expression form:
from physical expression, the pressure head difference of two sections is the total head loss. P in the above formula is dynamic water pressure, and the dynamic water pressure on the gradual flow water passing section is distributed according to the hydrostatic pressure rule, so the pressure head of the section is expressed as the reading (MPa) of the pressure gauge on the normal stress. The difference value measured by the two-point pressure gauge is the head loss of the pipe network of the layer, which is also called resistance loss.
The composition formula of the total head loss is as follows:
wherein h is l For total head loss, h f To loss of head on the way, h m Is the local head loss.
The on-way head loss coefficient is determined under the condition that the pipeline is built, and the scheme aims to regulate local waterHead loss factor. The main factors that contribute to the local head loss are: the flat-layer pipe network has more elbows and elbows, three-way branch joints, straight-through and other pipe fittings, reducer joints, valves, water meters and the like, and the local head loss cannot be ignored. Some floors are also laid with branch pipe circulation and local vertical pipe arrangement, which increase the difference of head loss. H of each floor after the adjustment of step S03 l Equal, so the allocated flow is also equal.
In this embodiment, the head loss is equal for each parallel circuit at the same flow rate. The flow distributed by each parallel circuit must be equal when the total flow varies. The flow balance relation is not influenced by the power characteristics and resistance characteristics (including the lift of a water supply pump, the resistance characteristics of a water supply main pipe, a partition pressure reducing valve and the like) outside the parallel system, and is not influenced by the flow change of the water supply main pipe. Under the full-circulation working condition, the hydraulic balance of each return water is kept basically stable no matter how the flow of the water supply main pipe changes, the effect is good in engineering practice, and the normal circulation of the whole network can be realized.
The invention has the advantages that:
1. users on each floor of an office building implement a water using scheme according to needs, and design and construction differences among the users are allowed, wherein the design and construction differences comprise: the number of drinking water point interfaces, the position of a water dispenser, the length of a pipeline, the caliber of the pipeline, the construction method and laying process of the pipeline, the number of elbows, the number of tee joints and straight joints, the configuration of water meters and valves, whether branch pipes circulate and the like. The resistance characteristic difference of the user pipelines, and the flow balance among the users can be realized by applying the technical method of the invention based on a relatively accurate quantification means, so that the actual requirements of drinking water solutions implemented by different users on different floors of an office building according to needs are met, and the method has great practical significance.
2. After the office building is put into use, along with the entrance of tenants, each floor can be flexibly connected into a direct drinking water system at any time, and flat-floor pipeline construction is implemented as required.
3. And users on any floor close or disconnect the system, and the flow balance relation of other floors is not influenced.
4. In the subsequent long-term operation process of the system, a user can flexibly change a drinking water scheme (increase and decrease of drinking water points, position shift of the drinking water points, pipeline arrangement transformation and the like), the hydraulic working condition of a local floor changes, and the hydraulic balance after the system changes can be realized according to the method.
5. The household regulating valve on each layer adopts a common food grade regulating valve with the standard above Sus304, has simple and convenient operation and high reliability, and reduces the manufacturing cost and the maintenance cost.
6. The invention only needs to add pressure gauges at the water supply and return inlet and outlet nodes, is convenient to install and maintain, and has no interference to water paths and water quality. The reason why the flowmeter is not adopted is that the flowmeter belongs to an overflow type instrument, the installation and the maintenance are troublesome, and the overflow type instrument is avoided being installed on a direct drinking water pipe network as far as possible in consideration of the risk of influencing water quality.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. An office building pipe network circulation system is characterized by comprising:
the water supply vertical pipe is connected with a water supply pump of a direct drinking water machine room and used for supplying water for buildings, and an outlet of the water supply pump of the direct drinking water machine room is provided with a flow meter;
the subarea water supply vertical pipe is connected with the water supply vertical pipe, vertically penetrates all floors of a subarea and supplies water to the subarea floors;
a plurality of flat water supply pipelines which are laid on each floor of the subareas, wherein each flat water supply pipeline is connected with the subarea water supply vertical pipe and laid horizontally along the floor, a plurality of drinking points with unequal number and uncertain positions are led out from each flat water supply pipeline, the number and the positions of the drinking points are determined according to the actual demands of users on each floor, and an entrance pressure meter and an entrance valve are arranged at the inlet of each flat water supply pipeline;
the system comprises a plurality of subareas, a plurality of flat-layer water return pipelines and a plurality of service pressure meters, wherein the subareas are arranged on each layer of the subareas, each flat-layer water return pipeline is connected with a flat-layer water supply pipeline and is horizontally arranged along the floor, the arrangement scheme of each layer of the flat-layer water return pipeline is different, each flat-layer water return pipeline is used for collecting return water of the flat-layer water supply pipeline, an outlet of each flat-layer water return pipeline is provided with a service pressure meter and a service regulating valve, and the caliber of a pipe section where the service pressure meter is located in each floor is consistent with the caliber of a pipe section where the service pressure meter is located;
a subregion return water riser, with a subregion water supply riser parallel arrangement, vertical run through in all floors of subregion, with many flat bed return water pipe connections, a subregion return water riser is used for collecting many flat bed return water pipe's return water, will the return water is retrieved extremely again direct drinking water computer lab.
2. An adjusting method for flow balance of an office building pipe network circulation system, which is applied to the office building pipe network circulation system of claim 1 or 2, and is characterized by comprising the following steps:
make each floor loop in a subarea at the same debugging flow Q 0 Then circulating independently;
the floor with the greatest head loss, called the worst floor, is selected and designated as L 0 Closing water inlet valves of other floors and independently letting L 0 The floors are circulated, and the L is recorded 0 The pressure value of the floor-to-home pressure gauge is P 1 Record said L 0 The pressure value of the floor outlet pressure gauge is P 2 Introduction of said L 0 The pressure difference of the pressure gauges for the entrance and the exit of the floor is recorded as P 0 ，P 0 = P 1 - P 2 ；
For each floor of other floors, the same L is adopted 0 The method for the same floor is characterized in that the water inlet valves of other floors are closed, the floor is circulated independently, and the flow Q is the same 0 Lower and adjust the buildingThe household outlet regulating valve of each floor ensures that the pressure difference value of the household inlet pressure gauge and the household outlet pressure gauge of each floor of loop is equal to P 0 ；
And after all the floors are completely adjusted, opening water inlet valves of all the floors to enable the subareas to enter a full circulation mode, and realizing flow balance of each floor loop.
3. Method according to claim 2, characterized in that the floor circuits in a zone are brought to the same commissioning flow Q 0 The following separate cycles were performed, including:
based on the flow measured by the flowmeter, the rotating speed of the water supply pump is changed by adjusting the frequency of a frequency converter of the water supply pump, so that the flow of each floor is the same when the floor is circulated independently; or alternatively
Through adjusting the return water valve in the direct drinking water machine room, the flow of each floor is the same when independently circulating.
4. Method according to claim 2, characterized in that the floor with the greatest head loss, called the worst floor, is selected and designated as L 0 The method comprises the following steps:
the worst floor L 0 The selection criteria of (2) are to select the floor with the longest path of the pipeline and the most fittings, the types of fittings include: elbow, tee bend, reducing joint, valve and water gauge.
5. Method according to claim 4, characterized in that the floor with the greatest head loss, called the worst floor, is selected and designated L 0 The method comprises the following steps:
cannot judge which layer is L 0 When floors are on, all floors are enabled to be at the same debugging flow Q 0 Respectively and independently circulating the lower floors, recording the pressure difference of the pressure gauges of the exit and the entrance of all floors, and selecting the floor with the maximum pressure difference as the L 0 A layer.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627115A (en) * | 2023-11-07 | 2024-03-01 | 湖南金龙给水设备有限公司 | Secondary water supply system and method with water pressure regulation and early warning functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117627115A (en) * | 2023-11-07 | 2024-03-01 | 湖南金龙给水设备有限公司 | Secondary water supply system and method with water pressure regulation and early warning functions |
| CN117627115B (en) * | 2023-11-07 | 2024-05-14 | 湖南金龙给水设备有限公司 | Secondary water supply system and method with water pressure regulation and early warning functions |
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Application publication date: 20221021 |